Third trimester

妊娠晚期
  • 文章类型: Journal Article
    本研究旨在评估妊娠晚期孕妇腿部痉挛的患病率并确定预测因素。
    招募了一个孕妇样本,这些孕妇处于妊娠晚期,经常去约旦当地的诊所就诊。参与者完成了社会人口统计学和临床特征问卷,腿部痉挛疼痛强度的数字疼痛评定量表(NPRS),孕妇身体活动问卷(PPAQ)的阿拉伯文版本,北欧肌肉骨骼问卷(NMQ),简式健康调查(SF-12),匹兹堡睡眠质量指数(PSQI)医院焦虑和抑郁量表(HADS)。此外,镁(Mg)和钙(Ca)血清水平进行检查。使用Logistic回归分析来确定腿部痉挛发生的预测因素。使用线性回归模型来研究报告腿部痉挛的孕妇腿部痉挛疼痛强度的预测因素。
    二百零五(n=205)名孕妇完成了这项研究。腿部痉挛的估计患病率为58%。Logistic回归结果显示,未接受家务援助(OR0.46,p=0.025),妊娠周数的进展(OR1.10,p=0.021),先前怀孕的次数(OR1.21,p=0.049),腿部肿胀(OR2.28,p=0.019),并且有胃肠道(GIT)问题(OR2.12,P=0.046)与较高的腿部痉挛发生几率相关.在孕妇腿部抽筋的子样本中,线性回归结果显示,孕妇高中文化程度与小学文化程度相比(β=0.70,p=0.012),工作小时数(β=0.11,p=0.010),使用维生素补充剂(β=-1.70,p=0.043),怀孕后患有糖尿病(β=1.05,p=0.036),有坐骨神经痛(β=0.58,p=0.028),髋部疼痛(β=-.33,p=0.029),较高的PSQI总分(β=0.09,p=0.020)是腿部痉挛疼痛强度的重要预测因素。
    许多与健康有关的疾病,以及与工作和家庭相关的工作特点,可能被认为是怀孕期间发生腿部痉挛和腿部痉挛疼痛强度增加的危险因素。
    UNASSIGNED: This study aimed to estimate the prevalence and determine predictors of leg cramps among pregnant women in their third trimester.
    UNASSIGNED: A sample of pregnant women in their third trimester who routinely visited local clinics in Jordan was recruited. Participants completed a socio-demographic and clinical characteristics questionnaire, the numeric pain rating scale (NPRS) for leg cramp pain intensity, the Arabic version of the Pregnant Physical Activity Questionnaire (PPAQ), the Nordic Musculoskeletal Questionnaire (NMQ), Short Form Health Survey (SF-12), Pittsburgh Sleep Quality Index (PSQI), and Hospital Anxiety and Depression Scale (HADS). In addition, magnesium (Mg) and calcium (Ca) serum levels were examined. Logistic regression analyses were used to identify predictors of leg cramps occurrence. A linear regression model was used to investigate predictors of leg cramps pain intensity among pregnant women who reported leg cramps.
    UNASSIGNED: Two hundred and five (n=205) pregnant women completed the study. The estimated prevalence of leg cramps was 58%. Logistic regression results showed that not receiving assistance with housework (OR 0.46, p=0.025), progress in the number of gestational weeks (OR 1.10, p=0.021), the number of previous pregnancies (OR 1.21, p=0.049), having leg swelling (OR 2.28, p=0.019), and having gastrointestinal (GIT) problems (OR 2.12, P=0.046) were associated with a higher odds of leg cramps occurrence. In the subsample with pregnant women with leg cramps, linear regression results showed that pregnant women with high school education versus elementary school (β=0.70, p=0.012), number of working hours (β=0.11, p=0.010), using vitamins supplements (β=-1.70, p=0.043), having diabetes after pregnancy (β=1.05, p=0.036), having sciatica (β=0.58, p=0.028), having hip pain (β =-.33, p=0.029), and higher PSQI total score (β=0.09, p=0.020) were the significant predictors of leg cramp pain intensity.
    UNASSIGNED: Many health-related conditions, as well as work and home-related work characteristics, may be considered risk factors for the occurrence of leg cramps and increased leg cramps pain intensity in pregnancy.
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  • 文章类型: Journal Article
    背景:妊娠晚期肌肉骨骼问题的治疗选择有限。本研究旨在研究脚跟高度如何影响步态生物力学,并为各种肌肉骨骼问题提供脚跟高度建议。
    方法:招募了五个妊娠晚期孕妇,穿着统一的鞋,鞋跟高度为四个(0毫米,15毫米,30毫米,和45毫米)。下肢肌肉力量,接头角度,接头扭矩,联合接触力,和特定时刻的地面反作用力(GRF)(第一个峰值,山谷,收集GRF的第二个峰值),以重复测量进行单向方差分析。
    结果:比目鱼,腓肠肌,胫骨后肌,plantaris,外部闭塞器,臀大肌,gemellussuperior,闭孔内部在GRF谷的鞋跟高度为45毫米和15毫米时最小。髋关节伸展和膝关节屈曲在15mm的高度显示最小的关节角度和关节扭矩。踝关节接触力随着脚跟高度的增加而降低。
    结论:脚跟的高度显著影响肌肉力量,接头角度,接头扭矩,和关节接触力。15毫米的脚跟可能是最合适的脚跟高度,以潜在地避免或减轻妊娠晚期的肌肉骨骼问题。
    BACKGROUND: The treatment options for third-trimester musculoskeletal issues are limited. This study aims to examine how heel height affects gait biomechanics and provides heel height recommendations for various musculoskeletal problems.
    METHODS: Five third-trimester gravidas were recruited wearing uniform footwear with four heel heights (0 mm, 15 mm, 30 mm, and 45 mm). Lower-limb muscle forces, joint angles, joint torques, joint contact forces, and ground reaction forces (GRF) at specific moments (the first peak, valley, and second peak of GRF) were collected for one-way analysis of variance with repeated measures.
    RESULTS: The soleus, gastrocnemius, tibialis posterior, plantaris, obturator externus, gluteus maximus, gemellus superior, and obturator internus were the smallest at heel heights of 45 mm and 15 mm at the valley of GRF. Hip extension and knee flexion displayed the smallest joint angle and joint torques at a height of 15 mm. Ankle joint contact force decreased with increased heel height.
    CONCLUSIONS: The height of the heel significantly impacts muscle force, joint angles, joint torques, and joint contact force. A heel of 15 mm might be the most suitable heel height to potentially avoid or alleviate musculoskeletal problems during the third trimester.
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  • 文章类型: Journal Article
    在中低收入国家(LMIC),很大一部分孕妇在妊娠14周后寻求首次产前护理。虽然末次月经期(LMP)仍然是确定胎龄(GA)的最普遍方法,基于超声的胎儿生物测量在孕中期和晚期被认为更准确。在LMIC设置中,Hadlock公式,最初是使用来自少数白种人的数据开发的,作为超声机器中的预编程公式,在全球范围内广泛用于估计GA和胎儿重量。这种方法在估计不同群体中的GA时会导致不准确。因此,这项研究旨在开发一种特定于人群的模型,用于估计妊娠晚期的GA,该模型与妊娠早期的GA估计一样准确。使用来自GARBH-Ini的数据,北印度地区医院的一个怀孕队列,随后在印度南部的一个独立队列中验证了该模型。
    通过纵向超声检查获得的所有妊娠中期的数据用于开发和验证妊娠中期和中期的GA模型。使用超声检查确定了妊娠早期GA评估的金标准。Garbhini-GA2,多项式回归模型,是使用基于遗传算法的方法开发的,展示所考虑的模型中的最佳性能。该模型包含了在第二和第三个三个月期间常规测量的五个超声参数中的三个。为了评估其性能,使用来自GARBH-Ini队列的测试集(N=1493)和来自基督教医学院(CMC)的独立验证数据集(N=948),将Garbhini-GA2模型与Hadlock和INTERGROWTH-21st模型进行了比较。Vellore队列。评估指标,包括均方根误差,偏见,和早产(PTB)率,用于综合评估模型的准确性和可靠性。
    以妊娠早期GA为基线,与Hadlock公式相比,Garbhini-GA2将GA估计中值误差降低了三倍以上。Further,与INTERGROWTH-21和Hadlock公式相比,使用Garbhini-GA2估计的PTB率更准确,高估了22.47%和58.91%,分别。
    Garbhini-GA2是第一个使用印度人口数据开发和验证的妊娠晚期GA估计模型。它在GA估计中具有更高的准确性,与妊娠早期和PTB分类的GA估计相当,强调了部署针对特定人群的GA配方以加强产前护理的重要性。
    GARBH-Ini队列研究由生物技术部资助,印度政府(BT/PR9983/MED/97/194/2013)。超声资料库得到了印度大挑战-所有儿童繁荣计划的部分支持,生物技术产业研究援助委员会,生物技术系,印度政府(BIRAC/GCI/0115/03/14-ACT)。本出版物中报告的研究是由生物技术产业研究援助委员会(BIRAC)的印度大挑战资助(BT/kiData0394/06/18),由DBT-BMGF-BIRAC联合支持的运营部门。CMCVellore的外部验证研究部分得到了印度生物技术产业研究援助委员会(BIRAC)的重大挑战资助(BT/kiData0394/06/18)的部分支持,由罗伯特·博世数据科学和人工智能中心(RBCDSAI)的DBT-BMGF-BIRAC和探索性研究资助(SB/20-21/0602/BT/RBCX/008481)共同支持的运营部门,马德拉斯研究所。PrakashArunachalam的明矾捐赠(BIO/18-19/304/ALUM/KARH)在综合生物学和系统医学中心部分资助了这项研究,马德拉斯研究所。
    UNASSIGNED: A large proportion of pregnant women in lower and middle-income countries (LMIC) seek their first antenatal care after 14 weeks of gestation. While the last menstrual period (LMP) is still the most prevalent method of determining gestational age (GA), ultrasound-based foetal biometry is considered more accurate in the second and third trimesters. In LMIC settings, the Hadlock formula, originally developed using data from a small Caucasian population, is widely used for estimating GA and foetal weight worldwide as the pre-programmed formula in ultrasound machines. This approach can lead to inaccuracies when estimating GA in a diverse population. Therefore, this study aimed to develop a population-specific model for estimating GA in the late trimesters that was as accurate as the GA estimation in the first trimester, using data from GARBH-Ini, a pregnancy cohort in a North Indian district hospital, and subsequently validate the model in an independent cohort in South India.
    UNASSIGNED: Data obtained by longitudinal ultrasonography across all trimesters of pregnancy was used to develop and validate GA models for the second and third trimesters. The gold standard for GA estimation in the first trimester was determined using ultrasonography. The Garbhini-GA2, a polynomial regression model, was developed using the genetic algorithm-based method, showcasing the best performance among the models considered. This model incorporated three of the five routinely measured ultrasonographic parameters during the second and third trimesters. To assess its performance, the Garbhini-GA2 model was compared against the Hadlock and INTERGROWTH-21st models using both the TEST set (N = 1493) from the GARBH-Ini cohort and an independent VALIDATION dataset (N = 948) from the Christian Medical College (CMC), Vellore cohort. Evaluation metrics, including root-mean-squared error, bias, and preterm birth (PTB) rates, were utilised to comprehensively assess the model\'s accuracy and reliability.
    UNASSIGNED: With first trimester GA dating as the baseline, Garbhini-GA2 reduced the GA estimation median error by more than three times compared to the Hadlock formula. Further, the PTB rate estimated using Garbhini-GA2 was more accurate when compared to the INTERGROWTH-21st and Hadlock formulae, which overestimated the rate by 22.47% and 58.91%, respectively.
    UNASSIGNED: The Garbhini-GA2 is the first late-trimester GA estimation model to be developed and validated using Indian population data. Its higher accuracy in GA estimation, comparable to GA estimation in the first trimester and PTB classification, underscores the significance of deploying population-specific GA formulae to enhance antenatal care.
    UNASSIGNED: The GARBH-Ini cohort study was funded by the Department of Biotechnology, Government of India (BT/PR9983/MED/97/194/2013). The ultrasound repository was partly supported by the Grand Challenges India-All Children Thriving Program, Biotechnology Industry Research Assistance Council, Department of Biotechnology, Government of India (BIRAC/GCI/0115/03/14-ACT). The research reported in this publication was made possible by a grant (BT/kiData0394/06/18) from the Grand Challenges India at Biotechnology Industry Research Assistance Council (BIRAC), an operating division jointly supported by DBT-BMGF-BIRAC. The external validation study at CMC Vellore was partly supported by a grant (BT/kiData0394/06/18) from the Grand Challenges India at Biotechnology Industry Research Assistance Council (BIRAC), an operating division jointly supported by DBT-BMGF-BIRAC and by Exploratory Research Grant (SB/20-21/0602/BT/RBCX/008481) from Robert Bosch Centre for Data Science and Artificial Intelligence (RBCDSAI), IIT Madras. An alum endowment from Prakash Arunachalam (BIO/18-19/304/ALUM/KARH) partly funded this study at the Centre for Integrative Biology and Systems Medicine, IIT Madras.
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  • 文章类型: Journal Article
    目的:通过32~34孕周(GW)额外空腹血糖(FBG)筛查,了解晚发性妊娠期糖尿病(GDM)的阳性率,并分析标准治疗后晚发性GDM的围生期结局。
    方法:前瞻性队列研究。
    方法:中国单一中心。
    方法:1130例妊娠早期和中期GDM筛查阴性的单胎妊娠。
    方法:在32-34GW下进行额外的FBG测试。FBG≥5.1mmol/L的孕妇被诊断为GDM,并接受标准化治疗。收集并比较围产期结局。
    方法:晚发性GDM的诊断,产科和新生儿结局。
    结果:6.3%(71/1130)的参与者FBG值≥5.1mmol/L,并被诊断为迟发性GDM。饮食治疗65例(91.5%),胰岛素治疗6例(8.5%)。比较足月分娩的围产期结局。巨大儿的发病率(22.7%vs.5.1%,调整后的比值比(aOR)5.51,95%置信区间(CI)1.83-16.61,p=0.002)和NICU转移(18.3%vs.10.1%,aOR1.94,95%CI1.01-3.74,p=0.046)晚发性GDM组明显高于FBG<5.1mmol/L组。妊娠期FBG升高与超重或肥胖相关(54.9%vs.34.9%,OR2.27,95%CI1.40-3.68,p=0.001)。
    结论:6.3%的妊娠早期和中期GDM筛查结果正常的单胎妊娠通过32-34GW的额外FBG筛查发现有迟发性GDM,在标准治疗后,他们在足月妊娠期间发生巨大儿的风险仍然明显更高。
    OBJECTIVE: To investigate the positive rate of late-onset gestational diabetes mellitus (GDM) by additional fasting blood glucose (FBG) screening at 32-34 gestational weeks (GW) and analyse the perinatal outcomes of late-onset GDM after standard treatment.
    METHODS: An Prospective cohort study.
    METHODS: Single centre in China.
    METHODS: 1130 singleton pregnancies with negative GDM screening in their first and second trimester.
    METHODS: Additional FBG testing was performed at 32-34 GW. Pregnancies with FBG ≥5.1 mmol/L were diagnosed as GDM and received standardized treatment. Perinatal outcomes were collected and compared.
    METHODS: Diagnosis of late-onset GDM, obstetric and neonatal outcomes.
    RESULTS: 6.3% (71/1130) of participants had FBG values ≥5.1 mmol/L and were diagnosed with late-onset GDM. Sixty-five (91.5%) were treated by dietary therapy and 6 (8.5%) by insulin therapy. The perinatal outcomes of full-term delivery were compared. The incidence of macrosomia (22.7% vs. 5.1%, adjusted odds ratio (aOR) 5.51, 95% confidence interval (CI) 1.83-16.61, p = 0.002) and NICU transferring (18.3% vs. 10.1%, aOR 1.94, 95% CI 1.01-3.74, p = 0.046) was significantly higher in late-onset GDM group than that in FBG <5.1 mmol/L group. Elevated FBG was associated with overweight or obesity during pregnancy (54.9% vs. 34.9%, OR 2.27, 95% CI 1.40-3.68, p = 0.001).
    CONCLUSIONS: 6.3% of singleton pregnancies with normal GDM screening results in the first and second trimester were found to have late-onset GDM by additional FBG screening at 32-34 GW, and their risk of macrosomia during a full-term pregnancy remains significantly higher after standard treatment.
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  • 文章类型: Case Reports
    一名41岁的妇女出现急性,妊娠37周时出现严重的左侧腹痛和呕吐。她的症状归因于肾绞痛,她接受了支持治疗。在她入院时,她开始自然分娩。由于其他产科适应症,该小组继续进行紧急剖腹产。术中,确定了坏死的左输卵管和卵巢,并诊断为附件扭转(AT)。去扭转时组织灌注没有恢复,并进行了左输卵管卵巢切除术。在怀孕期间AT是不寻常的,只有少数病例发生在妊娠晚期。这是一个具有挑战性的诊断,需要高度怀疑。超声和磁共振成像可能有助于建立诊断,但不应延迟明确的治疗。及时的手术干预对于防止卵巢组织的不可逆损伤至关重要。
    A 41-year-old woman presented with acute, severe left-sided abdominal pain and vomiting at 37 weeks\' gestation. Her symptoms were attributed to renal colic, and she was admitted for supportive treatment. During her admission, she went into spontaneous labour. Due to other obstetric indications, the team proceeded with delivery by emergency caesarean section. Intra-operatively, a necrotic left fallopian tube and ovary were identified, and a diagnosis of adnexal torsion (AT) was recognised. There was no return of tissue perfusion on de-torsion, and a left salpingo-oopherectomy was performed. AT in pregnancy is unusual, with only a minority of cases occurring in the third trimester. This is a challenging diagnosis to establish and requires a high index of suspicion. Ultrasound and magnetic resonance imaging can be helpful in establishing a diagnosis but should not delay definitive treatment. Prompt surgical intervention is paramount to prevent irreversible damage to ovarian tissue.
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  • 文章类型: Journal Article
    目的:评估中期超声扫描的质量评分是否可用于中期超声扫描。
    方法:使用RECRET研究数据进行前瞻性多中心辅助研究。未产妇女,没有历史报道,我们招募了由同一超声医师和使用同一超声机器进行的孕中期和晚期超声检查。比较孕中期和晚期超声扫描中各超声图像的整体评分和个体评分。对于非劣效性(单侧)配对Studentt检验计算样本量。
    结果:包括103名具有1606个匿名超声图像的女性。妊娠中期和中期超声扫描的中位足月为妊娠22.2周(22.0-22.7)和妊娠31.6周(30.7-34.7),分别。在妊娠中期和妊娠中期超声检查中,超声图像的平均全局得分相当(32.37±2.62对31.80±3.27,p=0.13)。每个生物特征参数的平均分数,即头围,腹围,和股骨骨干长度相当。与妊娠中期相比,妊娠中期四腔视图(5.11±0.91对5.36±0.75,p=0.02)和脊柱(4.18±1.17对5.22±1.02,p<0.001)的得分显着降低。与妊娠中期图像相比,妊娠中期图像的肾脏图像得分明显更高(4.73±0.51对4.32±0.67,p<0.001。
    结论:生物特征参数质量评分图像先前验证的孕中期超声扫描也可用于孕中期扫描。然而,解剖质量评分图像性能可能会有所不同之间的第二和第三个三个月的扫描。
    OBJECTIVE: To evaluate whether the quality scores validated for second-trimester ultrasound scan can be used for third-trimester ultrasound scan.
    METHODS: Prospective multicenter ancillary study using data from the RECRET study. Nulliparous women, with no reported history, with second- and third-trimester ultrasound examinations performed by the same ultrasonographer and using the same ultrasound machine were recruited. The global score and the individual score of each ultrasound image were compared between second- and third-trimester ultrasound scan. The sample size was calculated for a non-inferiority (one-sided) paired Student t test.
    RESULTS: 103 women with 1606 anonymized ultrasound images were included. The median term at second- and third-trimester ultrasound scan was 22.2 weeks gestation (22.0-22.7) and 31.6 weeks gestation (30.7-34.7), respectively. The mean global score of ultrasound images was comparable between the second- and the third-trimester ultrasound examination (32.37 ± 2.62 versus 31.80 ± 3.27, p = 0.13). Means scores for each biometric parameters i.e. head circumference, abdominal circumference, and femur diaphysis length were comparable. The scores for the four-chamber view (5.11 ± 0.91 versus 5.36 ± 0.75, p = 0.02) and the spine (4.18 ± 1.17 versus 5.22 ± 1.02, p < 0.001) were significantly lower in the third trimester compared to the second trimester. The score for the kidney image was significantly higher for third trimester images compared to second trimester images (4.73 ± 0.51 versus 4.32 ± 0.67, p < 0.001.
    CONCLUSIONS: Biometrics parameters quality scores images previously validated for the second trimester ultrasound scan can be also used for the third trimester scan. However, anatomical quality scores images performances may vary between the second and the third trimester scan.
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  • 文章类型: Journal Article
    背景:怀孕期间的身体形象感知和社会支持会影响孕妇所经历的心理困扰水平。因此,这项研究的目的是研究社会支持的各个组成部分与身体形象感知之间的关系,即尼日利亚妊娠晚期孕妇的心理困扰水平。
    方法:对246名妊娠晚期并在Ogbomoso选定的医疗机构就诊的孕妇进行了横断面研究,奥约州的一个半城市,尼日利亚。身体形象感知,社会支持,使用心理困扰量表收集数据。使用描述性和推断性统计(方差分析和多元回归)对数据进行分析和总结,显著性设置为p<0.05。
    结果:回归分析表明,孕妇心理困扰的变化中有44%是由背景变量解释的,婚姻状况,身体形象感知,评估支持,切实的支持,归属支持,身体形象感知与评价支持之间的相互作用,属于支持和有形支持。
    结论:干预计划侧重于加强有形支持,在减少妊娠晚期孕妇由于身体形象感知引起的心理困扰时,建议使用归属感支持和评估支持。
    BACKGROUND: Body image perception and social support during pregnancy can impact the psychological distress levels experienced by pregnant women. As a result, the purpose of this study was to examine the relationship between various components of social support and body image perception on psychological distress levels among pregnant women in their third trimester in Nigeria.
    METHODS: A cross-sectional study was conducted among 246 pregnant women who were in the third trimester and attending selected health care facilities in Ogbomoso, a semiurban city in Oyo State, Nigeria. Body image perception, social support, and psychological distress scales were used to collect the data. Data were analyzed and summarized using descriptive and inferential statistics (ANOVA and multiple regression), with significance set at p < 0.05.
    RESULTS: Regression analysis showed that 44% of the variation in psychological distress among pregnant women was explained by the background variables, marital status, body image perception, appraisal support, tangible support, belonging support, interaction between body image perception and appraisal support, belong support and tangible support.
    CONCLUSIONS: Intervention programs focusing on bolstering tangible support, belonging support and appraisal support are recommended at reducing the psychological distress due to body image perception among pregnant women at third trimester.
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  • 文章类型: Journal Article
    背景:胎儿性别影响妊娠期间胎儿和产妇的健康结局,但是这种联系仍然知之甚少。由于胎盘是胎儿交流的途径,来源于胎儿基因组,胎盘基因表达的性别差异可能解释了这些结果。
    目的:我们利用下一代测序技术来研究孕早期和孕晚期两种性别的正常人胎盘,以产生基于性别和妊娠的规范转录组。
    方法:我们分析了124个孕早期(T1,59名女性和65名男性)和43个孕晚期(T3,18名女性和25名男性)样本在每个孕期的性别差异和性别特异性妊娠差异。
    结果:胎盘在T1表现出更明显的性二态性,有94个T1和26个T3差异表达基因(DEGs)。性染色体在T1中占DEGs的60.6%,在T3中占DEGs的80.8%,不包括X/Y伪常染色体区域。有6个来自伪常染色体区域的DEGs,仅在T1中显着,在男性中均上调。DEGs在X染色体上的分布表明Xp(短臂)上的基因在胎盘性别差异中可能特别重要。X/Y同源基因的剂量补偿分析显示表达主要由X染色体贡献。在妊娠早期和晚期的性别特异性分析中,在T1中,男女共有2815个DEG上调,在T3中3263个普通DEG上调。T1有7个女性专属DEG上调,T3有15个女性专属DEG上调,T1有10个男性专属DEG上调,T3有20个男性专属DEG上调。
    结论:这是从健康妊娠开始的最大的胎盘队列,定义了规范的性别双态基因表达和性别共同,跨妊娠的性别特异性和性别专有基因表达。孕早期有最多的性二态笔录,在两个三个月中,与男性相比,女性中的大多数人都被上调。X染色体的短臂和伪常染色体区域在确定妊娠早期胎盘的性别差异方面尤为重要。由于怀孕是一个动态的状态,妊娠期性别特异性DEGs可能导致总体结局的性别二态变化.
    Fetal sex affects fetal and maternal health outcomes in pregnancy, but this connection remains poorly understood. As the placenta is the route of fetomaternal communication and derives from the fetal genome, placental gene expression sex differences may explain these outcomes.
    We utilized next generation sequencing to study the normal human placenta in both sexes in first and third trimester to generate a normative transcriptome based on sex and gestation.
    We analyzed 124 first trimester (T1, 59 female and 65 male) and 43 third trimester (T3, 18 female and 25 male) samples for sex differences within each trimester and sex-specific gestational differences.
    Placenta shows more significant sexual dimorphism in T1, with 94 T1 and 26 T3 differentially expressed genes (DEGs). The sex chromosomes contributed 60.6% of DEGs in T1 and 80.8% of DEGs in T3, excluding X/Y pseudoautosomal regions. There were 6 DEGs from the pseudoautosomal regions, only significant in T1 and all upregulated in males. The distribution of DEGs on the X chromosome suggests genes on Xp (the short arm) may be particularly important in placental sex differences. Dosage compensation analysis of X/Y homolog genes shows expression is primarily contributed by the X chromosome. In sex-specific analyses of first versus third trimester, there were 2815 DEGs common to both sexes upregulated in T1, and 3263 common DEGs upregulated in T3. There were 7 female-exclusive DEGs upregulated in T1, 15 female-exclusive DEGs upregulated in T3, 10 male-exclusive DEGs upregulated in T1, and 20 male-exclusive DEGs upregulated in T3.
    This is the largest cohort of placentas across gestation from healthy pregnancies defining the normative sex dimorphic gene expression and sex common, sex specific and sex exclusive gene expression across gestation. The first trimester has the most sexually dimorphic transcripts, and the majority were upregulated in females compared to males in both trimesters. The short arm of the X chromosome and the pseudoautosomal region is particularly critical in defining sex differences in the first trimester placenta. As pregnancy is a dynamic state, sex specific DEGs across gestation may contribute to sex dimorphic changes in overall outcomes.
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  • 文章类型: Journal Article
    在足月接受引产的孕妇中,Foley球排出后1小时内的早期基于时间的人工胎膜破裂(AROM)导致产程缩短近9小时,剖宫产率或产妇或新生儿不良结局无显著差异1.
    In pregnant patients at term undergoing induction of labor, early time-based artificial rupture of membranes (AROM) within 1 hour of Foley bulb expulsion results in a shorter duration of labor by nearly 9 hours with no significant difference in cesarean delivery rates or maternal or neonatal adverse outcomes.1.
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  • 文章类型: Journal Article
    背景:本研究旨在评估妊娠早期超声检测胎盘植入谱(PAS)的诊断准确性,并将其与妊娠中期和晚期超声在有PAS风险的妊娠中的准确性进行比较。
    方法:PubMed,Embase,和WebofScience,搜索数据库以确定从开始到3月10日发表的相关研究,2023年。纳入标准是所有研究,包括队列,病例控制,或横断面研究,评估了妊娠前14周(妊娠早期)或妊娠后14周(妊娠中期/妊娠中期)进行的妊娠早期超声诊断的准确性。主要结果是评估早期妊娠中超声检测PAS的诊断准确性,并将其与第二和第三孕期超声的准确性进行比较。次要结果是评估每种超声标记在妊娠三个月中的诊断准确性。参考标准为病理或手术检查证实的PAS。超声和不同超声征象检测PAS的潜力是通过计算灵敏度的摘要估计来评估的。特异性,诊断比值比(DOR)和阳性(LR+)和阴性(LR-)似然比。
    结果:共有37项研究,包括5,764例妊娠有PAS风险,有1348例确诊的PAS,包括在我们的分析中。荟萃分析的敏感性为86%(95%CI:78%,92%)和63%的特异性(95%CI:55%,70%)在孕早期,而敏感性为88%(95%CI:84%,91%),特异性为92%(95%CI:85%,96%)在第二/第三三个月期间。关于妊娠早期检查的超声标志物,下子宫血管过度表现出最高的敏感性,为97%(95%CI:19%,100%),和子宫膀胱界面不规则表现出最高的特异性为99%(95%CI:96%,100%)。然而,在第二/第三三个月,透明区损失的灵敏度最高,为80%(95%CI:72%,86%),而子宫膀胱界面不规则表现出99%的最高特异性(95%CI:97%,100%)。
    结论:妊娠早期超声诊断PAS的准确性与妊娠中期和妊娠晚期超声相似。对PAS高危患者进行常规的妊娠早期超声筛查可能会提高检出率,并允许早期转诊到三级护理中心进行妊娠管理。本文受版权保护。保留所有权利。
    OBJECTIVE: To assess the diagnostic accuracy of ultrasound for detecting placenta accreta spectrum (PAS) during the first trimester of pregnancy and compare it with the accuracy of second- and third-trimester ultrasound examination in pregnancies at risk for PAS.
    METHODS: PubMed, EMBASE and Web of Science databases were searched to identify relevant studies published from inception until 10 March 2023. Inclusion criteria were cohort, case-control or cross-sectional studies that evaluated the accuracy of ultrasound examination performed at < 14 weeks of gestation (first trimester) or ≥ 14 weeks of gestation (second/third trimester) for the diagnosis of PAS in pregnancies with clinical risk factors. The primary outcome was the diagnostic accuracy of sonography in detecting PAS in the first trimester, compared with the accuracy of ultrasound examination in the second and third trimesters. The secondary outcome was the diagnostic accuracy of each sonographic marker individually across the trimesters of pregnancy. The reference standard was PAS confirmed at pathological or surgical examination. The potential of ultrasound and different ultrasound signs to detect PAS was assessed by computing summary estimates of sensitivity, specificity, diagnostic odds ratio and positive and negative likelihood ratios.
    RESULTS: A total of 37 studies, including 5764 pregnancies at risk of PAS, with 1348 cases of confirmed PAS, were included in our analysis. The meta-analysis demonstrated that ultrasound had a sensitivity of 86% (95% CI, 78-92%) and specificity of 63% (95% CI, 55-70%) during the first trimester, and a sensitivity of 88% (95% CI, 84-91%) and specificity of 92% (95% CI, 85-96%) during the second/third trimester. Regarding sonographic markers examined in the first trimester, lower uterine hypervascularity exhibited the highest sensitivity (97% (95% CI, 19-100%)), and uterovesical interface irregularity demonstrated the highest specificity (99% (95% CI, 96-100%)). In the second/third trimester, loss of clear zone had the highest sensitivity (80% (95% CI, 72-86%)), and uterovesical interface irregularity exhibited the highest specificity (99% (95% CI, 97-100%)).
    CONCLUSIONS: First-trimester ultrasound examination has similar accuracy to second- and third-trimester ultrasound examinations for the diagnosis of PAS. Routine first-trimester ultrasound screening for patients at high risk of PAS may improve detection rates and allow earlier referral to tertiary care centers for pregnancy management. © 2024 International Society of Ultrasound in Obstetrics and Gynecology.
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